Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 26
   4 EXTRAVERSION =
   5 NAME = Rotary Wombat
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoids hard-to-debug behaviour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into vmlinux), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifdef V
  39   ifeq ("$(origin V)", "command line")
  40     KBUILD_VERBOSE = $(V)
  41   endif
  42 endif
  43 ifndef KBUILD_VERBOSE
  44   KBUILD_VERBOSE = 0
  45 endif
  46
  47 # Call a source code checker (by default, "sparse") as part of the
  48 # C compilation.
  49 #
  50 # Use 'make C=1' to enable checking of only re-compiled files.
  51 # Use 'make C=2' to enable checking of *all* source files, regardless
  52 # of whether they are re-compiled or not.
  53 #
  54 # See the file "Documentation/sparse.txt" for more details, including
  55 # where to get the "sparse" utility.
  56
  57 ifdef C
  58   ifeq ("$(origin C)", "command line")
  59     KBUILD_CHECKSRC = $(C)
  60   endif
  61 endif
  62 ifndef KBUILD_CHECKSRC
  63   KBUILD_CHECKSRC = 0
  64 endif
  65
  66 # Use make M=dir to specify directory of external module to build
  67 # Old syntax make ... SUBDIRS=$PWD is still supported
  68 # Setting the environment variable KBUILD_EXTMOD take precedence
  69 ifdef SUBDIRS
  70   KBUILD_EXTMOD ?= $(SUBDIRS)
  71 endif
  72 ifdef M
  73   ifeq ("$(origin M)", "command line")
  74     KBUILD_EXTMOD := $(M)
  75   endif
  76 endif
  77
  78
  79 # kbuild supports saving output files in a separate directory.
  80 # To locate output files in a separate directory two syntaxes are supported.
  81 # In both cases the working directory must be the root of the kernel src.
  82 # 1) O=
  83 # Use "make O=dir/to/store/output/files/"
  84 #
  85 # 2) Set KBUILD_OUTPUT
  86 # Set the environment variable KBUILD_OUTPUT to point to the directory
  87 # where the output files shall be placed.
  88 # export KBUILD_OUTPUT=dir/to/store/output/files/
  89 # make
  90 #
  91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92 # variable.
  93
  94
  95 # KBUILD_SRC is set on invocation of make in OBJ directory
  96 # KBUILD_SRC is not intended to be used by the regular user (for now)
  97 ifeq ($(KBUILD_SRC),)
  98
  99 # OK, Make called in directory where kernel src resides
 100 # Do we want to locate output files in a separate directory?
 101 ifdef O
 102   ifeq ("$(origin O)", "command line")
 103     KBUILD_OUTPUT := $(O)
 104   endif
 105 endif
 106
 107 # That's our default target when none is given on the command line
 108 PHONY := _all
 109 _all:
 110
 111 # Cancel implicit rules on top Makefile
 112 $(CURDIR)/Makefile Makefile: ;
 113
 114 ifneq ($(KBUILD_OUTPUT),)
 115 # Invoke a second make in the output directory, passing relevant variables
 116 # check that the output directory actually exists
 117 saved-output := $(KBUILD_OUTPUT)
 118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 119 $(if $(KBUILD_OUTPUT),, \
 120      $(error output directory "$(saved-output)" does not exist))
 121
 122 PHONY += $(MAKECMDGOALS) sub-make
 123
 124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 125         $(Q)@:
 126
 127 sub-make: FORCE
 128         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 129         KBUILD_SRC=$(CURDIR) \
 130         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 131         $(filter-out _all sub-make,$(MAKECMDGOALS))
 132
 133 # Leave processing to above invocation of make
 134 skip-makefile := 1
 135 endif # ifneq ($(KBUILD_OUTPUT),)
 136 endif # ifeq ($(KBUILD_SRC),)
 137
 138 # We process the rest of the Makefile if this is the final invocation of make
 139 ifeq ($(skip-makefile),)
 140
 141 # If building an external module we do not care about the all: rule
 142 # but instead _all depend on modules
 143 PHONY += all
 144 ifeq ($(KBUILD_EXTMOD),)
 145 _all: all
 146 else
 147 _all: modules
 148 endif
 149
 150 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 151 TOPDIR          := $(srctree)
 152 # FIXME - TOPDIR is obsolete, use srctree/objtree
 153 objtree         := $(CURDIR)
 154 src             := $(srctree)
 155 obj             := $(objtree)
 156
 157 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 158
 159 export srctree objtree VPATH TOPDIR
 160
 161
 162 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 163 # first, and if a usermode build is happening, the "ARCH=um" on the command
 164 # line overrides the setting of ARCH below.  If a native build is happening,
 165 # then ARCH is assigned, getting whatever value it gets normally, and
 166 # SUBARCH is subsequently ignored.
 167
 168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 169                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 170                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 171                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 172                                   -e s/sh.*/sh/ )
 173
 174 # Cross compiling and selecting different set of gcc/bin-utils
 175 # ---------------------------------------------------------------------------
 176 #
 177 # When performing cross compilation for other architectures ARCH shall be set
 178 # to the target architecture. (See arch/* for the possibilities).
 179 # ARCH can be set during invocation of make:
 180 # make ARCH=ia64
 181 # Another way is to have ARCH set in the environment.
 182 # The default ARCH is the host where make is executed.
 183
 184 # CROSS_COMPILE specify the prefix used for all executables used
 185 # during compilation. Only gcc and related bin-utils executables
 186 # are prefixed with $(CROSS_COMPILE).
 187 # CROSS_COMPILE can be set on the command line
 188 # make CROSS_COMPILE=ia64-linux-
 189 # Alternatively CROSS_COMPILE can be set in the environment.
 190 # Default value for CROSS_COMPILE is not to prefix executables
 191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 192 export KBUILD_BUILDHOST := $(SUBARCH)
 193 ARCH            ?= $(SUBARCH)
 194 CROSS_COMPILE   ?=
 195
 196 # Architecture as present in compile.h
 197 UTS_MACHINE     := $(ARCH)
 198 SRCARCH         := $(ARCH)
 199
 200 # Additional ARCH settings for x86
 201 ifeq ($(ARCH),i386)
 202         SRCARCH := x86
 203 endif
 204 ifeq ($(ARCH),x86_64)
 205         SRCARCH := x86
 206 endif
 207
 208 # Where to locate arch specific headers
 209 hdr-arch       := $(SRCARCH)
 210
 211 KCONFIG_CONFIG  ?= .config
 212
 213 # SHELL used by kbuild
 214 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 215           else if [ -x /bin/bash ]; then echo /bin/bash; \
 216           else echo sh; fi ; fi)
 217
 218 HOSTCC       = gcc
 219 HOSTCXX      = g++
 220 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 221 HOSTCXXFLAGS = -O2
 222
 223 # Decide whether to build built-in, modular, or both.
 224 # Normally, just do built-in.
 225
 226 KBUILD_MODULES :=
 227 KBUILD_BUILTIN := 1
 228
 229 #       If we have only "make modules", don't compile built-in objects.
 230 #       When we're building modules with modversions, we need to consider
 231 #       the built-in objects during the descend as well, in order to
 232 #       make sure the checksums are up to date before we record them.
 233
 234 ifeq ($(MAKECMDGOALS),modules)
 235   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 236 endif
 237
 238 #       If we have "make <whatever> modules", compile modules
 239 #       in addition to whatever we do anyway.
 240 #       Just "make" or "make all" shall build modules as well
 241
 242 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 243   KBUILD_MODULES := 1
 244 endif
 245
 246 ifeq ($(MAKECMDGOALS),)
 247   KBUILD_MODULES := 1
 248 endif
 249
 250 export KBUILD_MODULES KBUILD_BUILTIN
 251 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 252
 253 # Beautify output
 254 # ---------------------------------------------------------------------------
 255 #
 256 # Normally, we echo the whole command before executing it. By making
 257 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 258 # $(quiet) to choose other forms of output instead, e.g.
 259 #
 260 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 261 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 262 #
 263 # If $(quiet) is empty, the whole command will be printed.
 264 # If it is set to "quiet_", only the short version will be printed.
 265 # If it is set to "silent_", nothing will be printed at all, since
 266 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 267 #
 268 # A simple variant is to prefix commands with $(Q) - that's useful
 269 # for commands that shall be hidden in non-verbose mode.
 270 #
 271 #       $(Q)ln $@ :<
 272 #
 273 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 274 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 275
 276 ifeq ($(KBUILD_VERBOSE),1)
 277   quiet =
 278   Q =
 279 else
 280   quiet=quiet_
 281   Q = @
 282 endif
 283
 284 # If the user is running make -s (silent mode), suppress echoing of
 285 # commands
 286
 287 ifneq ($(findstring s,$(MAKEFLAGS)),)
 288   quiet=silent_
 289 endif
 290
 291 export quiet Q KBUILD_VERBOSE
 292
 293
 294 # Look for make include files relative to root of kernel src
 295 MAKEFLAGS += --include-dir=$(srctree)
 296
 297 # We need some generic definitions (do not try to remake the file).
 298 $(srctree)/scripts/Kbuild.include: ;
 299 include $(srctree)/scripts/Kbuild.include
 300
 301 # Make variables (CC, etc...)
 302
 303 AS              = $(CROSS_COMPILE)as
 304 LD              = $(CROSS_COMPILE)ld
 305 CC              = $(CROSS_COMPILE)gcc
 306 CPP             = $(CC) -E
 307 AR              = $(CROSS_COMPILE)ar
 308 NM              = $(CROSS_COMPILE)nm
 309 STRIP           = $(CROSS_COMPILE)strip
 310 OBJCOPY         = $(CROSS_COMPILE)objcopy
 311 OBJDUMP         = $(CROSS_COMPILE)objdump
 312 AWK             = awk
 313 GENKSYMS        = scripts/genksyms/genksyms
 314 DEPMOD          = /sbin/depmod
 315 KALLSYMS        = scripts/kallsyms
 316 PERL            = perl
 317 CHECK           = sparse
 318
 319 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 320 MODFLAGS        = -DMODULE
 321 CFLAGS_MODULE   = $(MODFLAGS)
 322 AFLAGS_MODULE   = $(MODFLAGS)
 323 LDFLAGS_MODULE  =
 324 CFLAGS_KERNEL   =
 325 AFLAGS_KERNEL   =
 326
 327
 328 # Use LINUXINCLUDE when you must reference the include/ directory.
 329 # Needed to be compatible with the O= option
 330 LINUXINCLUDE    := -Iinclude \
 331                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 332                    -I$(srctree)/arch/$(hdr-arch)/include               \
 333                    -include include/linux/autoconf.h
 334
 335 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 336
 337 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 338                    -fno-strict-aliasing -fno-common \
 339                    -Werror-implicit-function-declaration
 340 KBUILD_AFLAGS   := -D__ASSEMBLY__
 341
 342 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 343 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 344 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 345
 346 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 347 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 348 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 349 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 350
 351 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 352 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 353 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 354
 355 # When compiling out-of-tree modules, put MODVERDIR in the module
 356 # tree rather than in the kernel tree. The kernel tree might
 357 # even be read-only.
 358 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 359
 360 # Files to ignore in find ... statements
 361
 362 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 363 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 364
 365 # ===========================================================================
 366 # Rules shared between *config targets and build targets
 367
 368 # Basic helpers built in scripts/
 369 PHONY += scripts_basic
 370 scripts_basic:
 371         $(Q)$(MAKE) $(build)=scripts/basic
 372
 373 # To avoid any implicit rule to kick in, define an empty command.
 374 scripts/basic/%: scripts_basic ;
 375
 376 PHONY += outputmakefile
 377 # outputmakefile generates a Makefile in the output directory, if using a
 378 # separate output directory. This allows convenient use of make in the
 379 # output directory.
 380 outputmakefile:
 381 ifneq ($(KBUILD_SRC),)
 382         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 383             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 384 endif
 385
 386 # To make sure we do not include .config for any of the *config targets
 387 # catch them early, and hand them over to scripts/kconfig/Makefile
 388 # It is allowed to specify more targets when calling make, including
 389 # mixing *config targets and build targets.
 390 # For example 'make oldconfig all'.
 391 # Detect when mixed targets is specified, and make a second invocation
 392 # of make so .config is not included in this case either (for *config).
 393
 394 no-dot-config-targets := clean mrproper distclean \
 395                          cscope TAGS tags help %docs check% \
 396                          include/linux/version.h headers_% \
 397                          kernelrelease kernelversion
 398
 399 config-targets := 0
 400 mixed-targets  := 0
 401 dot-config     := 1
 402
 403 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 404         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 405                 dot-config := 0
 406         endif
 407 endif
 408
 409 ifeq ($(KBUILD_EXTMOD),)
 410         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 411                 config-targets := 1
 412                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 413                         mixed-targets := 1
 414                 endif
 415         endif
 416 endif
 417
 418 ifeq ($(mixed-targets),1)
 419 # ===========================================================================
 420 # We're called with mixed targets (*config and build targets).
 421 # Handle them one by one.
 422
 423 %:: FORCE
 424         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 425
 426 else
 427 ifeq ($(config-targets),1)
 428 # ===========================================================================
 429 # *config targets only - make sure prerequisites are updated, and descend
 430 # in scripts/kconfig to make the *config target
 431
 432 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 433 # KBUILD_DEFCONFIG may point out an alternative default configuration
 434 # used for 'make defconfig'
 435 include $(srctree)/arch/$(SRCARCH)/Makefile
 436 export KBUILD_DEFCONFIG
 437
 438 config %config: scripts_basic outputmakefile FORCE
 439         $(Q)mkdir -p include/linux include/config
 440         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 441
 442 else
 443 # ===========================================================================
 444 # Build targets only - this includes vmlinux, arch specific targets, clean
 445 # targets and others. In general all targets except *config targets.
 446
 447 ifeq ($(KBUILD_EXTMOD),)
 448 # Additional helpers built in scripts/
 449 # Carefully list dependencies so we do not try to build scripts twice
 450 # in parallel
 451 PHONY += scripts
 452 scripts: scripts_basic include/config/auto.conf
 453         $(Q)$(MAKE) $(build)=$(@)
 454
 455 # Objects we will link into vmlinux / subdirs we need to visit
 456 init-y          := init/
 457 drivers-y       := drivers/ sound/ firmware/
 458 net-y           := net/
 459 libs-y          := lib/
 460 core-y          := usr/
 461 endif # KBUILD_EXTMOD
 462
 463 ifeq ($(dot-config),1)
 464 # Read in config
 465 -include include/config/auto.conf
 466
 467 ifeq ($(KBUILD_EXTMOD),)
 468 # Read in dependencies to all Kconfig* files, make sure to run
 469 # oldconfig if changes are detected.
 470 -include include/config/auto.conf.cmd
 471
 472 # To avoid any implicit rule to kick in, define an empty command
 473 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 474
 475 # If .config is newer than include/config/auto.conf, someone tinkered
 476 # with it and forgot to run make oldconfig.
 477 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 478 # we execute the config step to be sure to catch updated Kconfig files
 479 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 480         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 481 else
 482 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 483 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 484 PHONY += include/config/auto.conf
 485
 486 include/config/auto.conf:
 487         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 488         echo;                                                           \
 489         echo "  ERROR: Kernel configuration is invalid.";               \
 490         echo "         include/linux/autoconf.h or $@ are missing.";    \
 491         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 492         echo;                                                           \
 493         /bin/false)
 494
 495 endif # KBUILD_EXTMOD
 496
 497 else
 498 # Dummy target needed, because used as prerequisite
 499 include/config/auto.conf: ;
 500 endif # $(dot-config)
 501
 502 # The all: target is the default when no target is given on the
 503 # command line.
 504 # This allow a user to issue only 'make' to build a kernel including modules
 505 # Defaults vmlinux but it is usually overridden in the arch makefile
 506 all: vmlinux
 507
 508 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 509 KBUILD_CFLAGS   += -Os
 510 else
 511 KBUILD_CFLAGS   += -O2
 512 endif
 513
 514 include $(srctree)/arch/$(SRCARCH)/Makefile
 515
 516 ifneq (CONFIG_FRAME_WARN,0)
 517 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 518 endif
 519
 520 # Force gcc to behave correct even for buggy distributions
 521 # Arch Makefiles may override this setting
 522 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 523
 524 ifdef CONFIG_FRAME_POINTER
 525 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 526 else
 527 KBUILD_CFLAGS   += -fomit-frame-pointer
 528 endif
 529
 530 ifdef CONFIG_DEBUG_INFO
 531 KBUILD_CFLAGS   += -g
 532 KBUILD_AFLAGS   += -gdwarf-2
 533 endif
 534
 535 ifdef CONFIG_FTRACE
 536 KBUILD_CFLAGS   += -pg
 537 endif
 538
 539 # We trigger additional mismatches with less inlining
 540 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 541 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 542 endif
 543
 544 # arch Makefile may override CC so keep this after arch Makefile is included
 545 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 546 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 547
 548 # warn about C99 declaration after statement
 549 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 550
 551 # disable pointer signed / unsigned warnings in gcc 4.0
 552 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 553
 554 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 555 # But warn user when we do so
 556 warn-assign = \
 557 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 558
 559 ifneq ($(KCPPFLAGS),)
 560         $(call warn-assign,CPPFLAGS)
 561         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 562 endif
 563 ifneq ($(KAFLAGS),)
 564         $(call warn-assign,AFLAGS)
 565         KBUILD_AFLAGS += $(KAFLAGS)
 566 endif
 567 ifneq ($(KCFLAGS),)
 568         $(call warn-assign,CFLAGS)
 569         KBUILD_CFLAGS += $(KCFLAGS)
 570 endif
 571
 572 # Use --build-id when available.
 573 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 574                               $(call ld-option, -Wl$(comma)--build-id,))
 575 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 576 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 577
 578 # Default kernel image to build when no specific target is given.
 579 # KBUILD_IMAGE may be overruled on the command line or
 580 # set in the environment
 581 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 582 # this default value
 583 export KBUILD_IMAGE ?= vmlinux
 584
 585 #
 586 # INSTALL_PATH specifies where to place the updated kernel and system map
 587 # images. Default is /boot, but you can set it to other values
 588 export  INSTALL_PATH ?= /boot
 589
 590 #
 591 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 592 # relocations required by build roots.  This is not defined in the
 593 # makefile but the argument can be passed to make if needed.
 594 #
 595
 596 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 597 export MODLIB
 598
 599 #
 600 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 601 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 602 #  the default option --strip-debug will be used.  Otherwise,
 603 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 604
 605 ifdef INSTALL_MOD_STRIP
 606 ifeq ($(INSTALL_MOD_STRIP),1)
 607 mod_strip_cmd = $(STRIP) --strip-debug
 608 else
 609 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 610 endif # INSTALL_MOD_STRIP=1
 611 else
 612 mod_strip_cmd = true
 613 endif # INSTALL_MOD_STRIP
 614 export mod_strip_cmd
 615
 616
 617 ifeq ($(KBUILD_EXTMOD),)
 618 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 619
 620 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 621                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 622                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 623
 624 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 625                      $(init-n) $(init-) \
 626                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 627                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 628
 629 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 630 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 631 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 632 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 633 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 634 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 635 libs-y          := $(libs-y1) $(libs-y2)
 636
 637 # Build vmlinux
 638 # ---------------------------------------------------------------------------
 639 # vmlinux is built from the objects selected by $(vmlinux-init) and
 640 # $(vmlinux-main). Most are built-in.o files from top-level directories
 641 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 642 # Ordering when linking is important, and $(vmlinux-init) must be first.
 643 #
 644 # vmlinux
 645 #   ^
 646 #   |
 647 #   +-< $(vmlinux-init)
 648 #   |   +--< init/version.o + more
 649 #   |
 650 #   +--< $(vmlinux-main)
 651 #   |    +--< driver/built-in.o mm/built-in.o + more
 652 #   |
 653 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 654 #
 655 # vmlinux version (uname -v) cannot be updated during normal
 656 # descending-into-subdirs phase since we do not yet know if we need to
 657 # update vmlinux.
 658 # Therefore this step is delayed until just before final link of vmlinux -
 659 # except in the kallsyms case where it is done just before adding the
 660 # symbols to the kernel.
 661 #
 662 # System.map is generated to document addresses of all kernel symbols
 663
 664 vmlinux-init := $(head-y) $(init-y)
 665 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 666 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 667 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 668 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 669
 670 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 671 # May be overridden by arch/$(ARCH)/Makefile
 672 quiet_cmd_vmlinux__ ?= LD      $@
 673       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 674       -T $(vmlinux-lds) $(vmlinux-init)                          \
 675       --start-group $(vmlinux-main) --end-group                  \
 676       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 677
 678 # Generate new vmlinux version
 679 quiet_cmd_vmlinux_version = GEN     .version
 680       cmd_vmlinux_version = set -e;                     \
 681         if [ ! -r .version ]; then                      \
 682           rm -f .version;                               \
 683           echo 1 >.version;                             \
 684         else                                            \
 685           mv .version .old_version;                     \
 686           expr 0$$(cat .old_version) + 1 >.version;     \
 687         fi;                                             \
 688         $(MAKE) $(build)=init
 689
 690 # Generate System.map
 691 quiet_cmd_sysmap = SYSMAP
 692       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 693
 694 # Link of vmlinux
 695 # If CONFIG_KALLSYMS is set .version is already updated
 696 # Generate System.map and verify that the content is consistent
 697 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 698 # First command is ':' to allow us to use + in front of the rule
 699 define rule_vmlinux__
 700         :
 701         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 702
 703         $(call cmd,vmlinux__)
 704         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 705
 706         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 707           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 708         $(cmd_sysmap) $@ System.map;                                         \
 709         if [ $$? -ne 0 ]; then                                               \
 710                 rm -f $@;                                                    \
 711                 /bin/false;                                                  \
 712         fi;
 713         $(verify_kallsyms)
 714 endef
 715
 716
 717 ifdef CONFIG_KALLSYMS
 718 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 719 # It's a three stage process:
 720 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 721 #   empty
 722 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 723 #   the right size - vmlinux version (uname -v) is updated during this step
 724 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 725 #   but due to the added section, some addresses have shifted.
 726 #   From here, we generate a correct .tmp_kallsyms2.o
 727 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 728 # o Verify that the System.map from vmlinux matches the map from
 729 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 730 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 731 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 732 #   temporary bypass to allow the kernel to be built while the
 733 #   maintainers work out what went wrong with kallsyms.
 734
 735 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 736 last_kallsyms := 3
 737 else
 738 last_kallsyms := 2
 739 endif
 740
 741 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 742
 743 define verify_kallsyms
 744         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 745           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 746           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 747         $(Q)cmp -s System.map .tmp_System.map ||                             \
 748                 (echo Inconsistent kallsyms data;                            \
 749                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 750                  rm .tmp_kallsyms* ; /bin/false )
 751 endef
 752
 753 # Update vmlinux version before link
 754 # Use + in front of this rule to silent warning about make -j1
 755 # First command is ':' to allow us to use + in front of this rule
 756 cmd_ksym_ld = $(cmd_vmlinux__)
 757 define rule_ksym_ld
 758         :
 759         +$(call cmd,vmlinux_version)
 760         $(call cmd,vmlinux__)
 761         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 762 endef
 763
 764 # Generate .S file with all kernel symbols
 765 quiet_cmd_kallsyms = KSYM    $@
 766       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 767                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 768
 769 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 770         $(call if_changed_dep,as_o_S)
 771
 772 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 773         $(call cmd,kallsyms)
 774
 775 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 776 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 777         $(call if_changed_rule,ksym_ld)
 778
 779 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 780         $(call if_changed,vmlinux__)
 781
 782 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 783         $(call if_changed,vmlinux__)
 784
 785 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 786 $(KALLSYMS): scripts ;
 787
 788 # Generate some data for debugging strange kallsyms problems
 789 debug_kallsyms: .tmp_map$(last_kallsyms)
 790
 791 .tmp_map%: .tmp_vmlinux% FORCE
 792         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 793
 794 .tmp_map3: .tmp_map2
 795
 796 .tmp_map2: .tmp_map1
 797
 798 endif # ifdef CONFIG_KALLSYMS
 799
 800 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 801 # relevant sections renamed as per the linker script.
 802 quiet_cmd_vmlinux-modpost = LD      $@
 803       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 804          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 805          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 806 define rule_vmlinux-modpost
 807         :
 808         +$(call cmd,vmlinux-modpost)
 809         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 810         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 811 endef
 812
 813 # vmlinux image - including updated kernel symbols
 814 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 815 ifdef CONFIG_HEADERS_CHECK
 816         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 817 endif
 818 ifdef CONFIG_SAMPLES
 819         $(Q)$(MAKE) $(build)=samples
 820 endif
 821         $(call vmlinux-modpost)
 822         $(call if_changed_rule,vmlinux__)
 823         $(Q)rm -f .old_version
 824
 825 # build vmlinux.o first to catch section mismatch errors early
 826 ifdef CONFIG_KALLSYMS
 827 .tmp_vmlinux1: vmlinux.o
 828 endif
 829
 830 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 831 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 832         $(call if_changed_rule,vmlinux-modpost)
 833
 834 # The actual objects are generated when descending,
 835 # make sure no implicit rule kicks in
 836 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 837
 838 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 839 # Preset locale variables to speed up the build process. Limit locale
 840 # tweaks to this spot to avoid wrong language settings when running
 841 # make menuconfig etc.
 842 # Error messages still appears in the original language
 843
 844 PHONY += $(vmlinux-dirs)
 845 $(vmlinux-dirs): prepare scripts
 846         $(Q)$(MAKE) $(build)=$@
 847
 848 # Build the kernel release string
 849 #
 850 # The KERNELRELEASE value built here is stored in the file
 851 # include/config/kernel.release, and is used when executing several
 852 # make targets, such as "make install" or "make modules_install."
 853 #
 854 # The eventual kernel release string consists of the following fields,
 855 # shown in a hierarchical format to show how smaller parts are concatenated
 856 # to form the larger and final value, with values coming from places like
 857 # the Makefile, kernel config options, make command line options and/or
 858 # SCM tag information.
 859 #
 860 #       $(KERNELVERSION)
 861 #         $(VERSION)                    eg, 2
 862 #         $(PATCHLEVEL)                 eg, 6
 863 #         $(SUBLEVEL)                   eg, 18
 864 #         $(EXTRAVERSION)               eg, -rc6
 865 #       $(localver-full)
 866 #         $(localver)
 867 #           localversion*               (files without backups, containing '~')
 868 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 869 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 870 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 871 #           $(LOCALVERSION)             (from make command line if provided)
 872 #
 873 #  Note how the final $(localver-auto) string is included *only* if the
 874 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 875 # moment, only git is supported but other SCMs can edit the script
 876 # scripts/setlocalversion and add the appropriate checks as needed.
 877
 878 pattern = ".*/localversion[^~]*"
 879 string  = $(shell cat /dev/null \
 880            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 881
 882 localver = $(subst $(space),, $(string) \
 883                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 884
 885 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 886 # and if the SCM is know a tag from the SCM is appended.
 887 # The appended tag is determined by the SCM used.
 888 #
 889 # Currently, only git is supported.
 890 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 891 # checks as needed.
 892 ifdef CONFIG_LOCALVERSION_AUTO
 893         _localver-auto = $(shell $(CONFIG_SHELL) \
 894                           $(srctree)/scripts/setlocalversion $(srctree))
 895         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 896 endif
 897
 898 localver-full = $(localver)$(localver-auto)
 899
 900 # Store (new) KERNELRELASE string in include/config/kernel.release
 901 kernelrelease = $(KERNELVERSION)$(localver-full)
 902 include/config/kernel.release: include/config/auto.conf FORCE
 903         $(Q)rm -f $@
 904         $(Q)echo $(kernelrelease) > $@
 905
 906
 907 # Things we need to do before we recursively start building the kernel
 908 # or the modules are listed in "prepare".
 909 # A multi level approach is used. prepareN is processed before prepareN-1.
 910 # archprepare is used in arch Makefiles and when processed asm symlink,
 911 # version.h and scripts_basic is processed / created.
 912
 913 # Listed in dependency order
 914 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 915
 916 # prepare3 is used to check if we are building in a separate output directory,
 917 # and if so do:
 918 # 1) Check that make has not been executed in the kernel src $(srctree)
 919 # 2) Create the include2 directory, used for the second asm symlink
 920 prepare3: include/config/kernel.release
 921 ifneq ($(KBUILD_SRC),)
 922         @echo '  Using $(srctree) as source for kernel'
 923         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 924                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 925                 echo "  in the '$(srctree)' directory.";\
 926                 /bin/false; \
 927         fi;
 928         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 929         $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then  \
 930             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 931             fi
 932 endif
 933
 934 # prepare2 creates a makefile if using a separate output directory
 935 prepare2: prepare3 outputmakefile
 936
 937 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 938                    include/asm include/config/auto.conf
 939         $(cmd_crmodverdir)
 940
 941 archprepare: prepare1 scripts_basic
 942
 943 prepare0: archprepare FORCE
 944         $(Q)$(MAKE) $(build)=.
 945         $(Q)$(MAKE) $(build)=. missing-syscalls
 946
 947 # All the preparing..
 948 prepare: prepare0
 949
 950 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 951 # done in arch/$(ARCH)/kernel/Makefile
 952
 953 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 954
 955 # The asm symlink changes when $(ARCH) changes.
 956 # Detect this and ask user to run make mrproper
 957 define check-symlink
 958         set -e;                                                            \
 959         if [ -L include/asm ]; then                                        \
 960                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
 961                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
 962                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
 963                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
 964                         exit 1;                                            \
 965                 fi;                                                        \
 966         fi
 967 endef
 968
 969 # We create the target directory of the symlink if it does
 970 # not exist so the test in chack-symlink works and we have a
 971 # directory for generated filesas used by some architectures.
 972 define create-symlink
 973         if [ ! -L include/asm ]; then                                      \
 974                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
 975                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
 976                                 mkdir -p include/asm-$(SRCARCH);           \
 977                         fi;                                                \
 978                         ln -fsn asm-$(SRCARCH) $@;                         \
 979         fi
 980 endef
 981
 982 include/asm: FORCE
 983         $(Q)$(check-symlink)
 984         $(Q)$(create-symlink)
 985
 986 # Generate some files
 987 # ---------------------------------------------------------------------------
 988
 989 # KERNELRELEASE can change from a few different places, meaning version.h
 990 # needs to be updated, so this check is forced on all builds
 991
 992 uts_len := 64
 993 define filechk_utsrelease.h
 994         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 995           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 996           exit 1;                                                         \
 997         fi;                                                               \
 998         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 999 endef
1000
1001 define filechk_version.h
1002         (echo \#define LINUX_VERSION_CODE $(shell                             \
1003         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1004         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1005 endef
1006
1007 include/linux/version.h: $(srctree)/Makefile FORCE
1008         $(call filechk,version.h)
1009
1010 include/linux/utsrelease.h: include/config/kernel.release FORCE
1011         $(call filechk,utsrelease.h)
1012
1013 # ---------------------------------------------------------------------------
1014
1015 PHONY += depend dep
1016 depend dep:
1017         @echo '*** Warning: make $@ is unnecessary now.'
1018
1019 # ---------------------------------------------------------------------------
1020 # Firmware install
1021 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1022 export INSTALL_FW_PATH
1023
1024 PHONY += firmware_install
1025 firmware_install: FORCE
1026         @mkdir -p $(objtree)/firmware
1027         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1028
1029 # ---------------------------------------------------------------------------
1030 # Kernel headers
1031
1032 #Default location for installed headers
1033 export INSTALL_HDR_PATH = $(objtree)/usr
1034
1035 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1036 # Find out where the Kbuild file is located to support
1037 # arch/$(ARCH)/include/asm
1038 hdr-dir = $(strip                                                         \
1039           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1040                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1041
1042 # If we do an all arch process set dst to asm-$(hdr-arch)
1043 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1044
1045 PHONY += __headers
1046 __headers: include/linux/version.h scripts_basic FORCE
1047         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1048
1049 PHONY += headers_install_all
1050 headers_install_all:
1051         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1052
1053 PHONY += headers_install
1054 headers_install: __headers
1055         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1056         $(error Headers not exportable for the $(SRCARCH) architecture))
1057         $(Q)$(MAKE) $(hdr-inst)=include
1058         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1059
1060 PHONY += headers_check_all
1061 headers_check_all: headers_install_all
1062         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1063
1064 PHONY += headers_check
1065 headers_check: headers_install
1066         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1067         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1068
1069 # ---------------------------------------------------------------------------
1070 # Modules
1071
1072 ifdef CONFIG_MODULES
1073
1074 # By default, build modules as well
1075
1076 all: modules
1077
1078 #       Build modules
1079 #
1080 #       A module can be listed more than once in obj-m resulting in
1081 #       duplicate lines in modules.order files.  Those are removed
1082 #       using awk while concatenating to the final file.
1083
1084 PHONY += modules
1085 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1086         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1087         @echo '  Building modules, stage 2.';
1088         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1089         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1090
1091
1092 # Target to prepare building external modules
1093 PHONY += modules_prepare
1094 modules_prepare: prepare scripts
1095
1096 # Target to install modules
1097 PHONY += modules_install
1098 modules_install: _modinst_ _modinst_post
1099
1100 PHONY += _modinst_
1101 _modinst_:
1102         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1103                 echo "Warning: you may need to install module-init-tools"; \
1104                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1105                 sleep 1; \
1106         fi
1107         @rm -rf $(MODLIB)/kernel
1108         @rm -f $(MODLIB)/source
1109         @mkdir -p $(MODLIB)/kernel
1110         @ln -s $(srctree) $(MODLIB)/source
1111         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1112                 rm -f $(MODLIB)/build ; \
1113                 ln -s $(objtree) $(MODLIB)/build ; \
1114         fi
1115         @cp -f $(objtree)/modules.order $(MODLIB)/
1116         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1117
1118 # This depmod is only for convenience to give the initial
1119 # boot a modules.dep even before / is mounted read-write.  However the
1120 # boot script depmod is the master version.
1121 PHONY += _modinst_post
1122 _modinst_post: _modinst_
1123         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1124         $(call cmd,depmod)
1125
1126 else # CONFIG_MODULES
1127
1128 # Modules not configured
1129 # ---------------------------------------------------------------------------
1130
1131 modules modules_install: FORCE
1132         @echo
1133         @echo "The present kernel configuration has modules disabled."
1134         @echo "Type 'make config' and enable loadable module support."
1135         @echo "Then build a kernel with module support enabled."
1136         @echo
1137         @exit 1
1138
1139 endif # CONFIG_MODULES
1140
1141 ###
1142 # Cleaning is done on three levels.
1143 # make clean     Delete most generated files
1144 #                Leave enough to build external modules
1145 # make mrproper  Delete the current configuration, and all generated files
1146 # make distclean Remove editor backup files, patch leftover files and the like
1147
1148 # Directories & files removed with 'make clean'
1149 CLEAN_DIRS  += $(MODVERDIR)
1150 CLEAN_FILES +=  vmlinux System.map \
1151                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1152
1153 # Directories & files removed with 'make mrproper'
1154 MRPROPER_DIRS  += include/config include2 usr/include
1155 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1156                   include/linux/autoconf.h include/linux/version.h      \
1157                   include/linux/utsrelease.h                            \
1158                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1159                   Module.symvers Module.markers tags TAGS cscope*
1160
1161 # clean - Delete most, but leave enough to build external modules
1162 #
1163 clean: rm-dirs  := $(CLEAN_DIRS)
1164 clean: rm-files := $(CLEAN_FILES)
1165 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1166
1167 PHONY += $(clean-dirs) clean archclean
1168 $(clean-dirs):
1169         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1170
1171 clean: archclean $(clean-dirs)
1172         $(call cmd,rmdirs)
1173         $(call cmd,rmfiles)
1174         @find . $(RCS_FIND_IGNORE) \
1175                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1176                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1177                 -o -name '*.symtypes' -o -name 'modules.order' \
1178                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1179                 -type f -print | xargs rm -f
1180
1181 # mrproper - Delete all generated files, including .config
1182 #
1183 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1184 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1185 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1186
1187 PHONY += $(mrproper-dirs) mrproper archmrproper
1188 $(mrproper-dirs):
1189         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1190
1191 mrproper: clean archmrproper $(mrproper-dirs)
1192         $(call cmd,rmdirs)
1193         $(call cmd,rmfiles)
1194
1195 # distclean
1196 #
1197 PHONY += distclean
1198
1199 distclean: mrproper
1200         @find $(srctree) $(RCS_FIND_IGNORE) \
1201                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1202                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1203                 -o -name '.*.rej' -o -size 0 \
1204                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1205                 -type f -print | xargs rm -f
1206
1207
1208 # Packaging of the kernel to various formats
1209 # ---------------------------------------------------------------------------
1210 # rpm target kept for backward compatibility
1211 package-dir     := $(srctree)/scripts/package
1212
1213 %pkg: include/config/kernel.release FORCE
1214         $(Q)$(MAKE) $(build)=$(package-dir) $@
1215 rpm: include/config/kernel.release FORCE
1216         $(Q)$(MAKE) $(build)=$(package-dir) $@
1217
1218
1219 # Brief documentation of the typical targets used
1220 # ---------------------------------------------------------------------------
1221
1222 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1223 boards := $(notdir $(boards))
1224 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1225 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1226
1227 help:
1228         @echo  'Cleaning targets:'
1229         @echo  '  clean           - Remove most generated files but keep the config and'
1230         @echo  '                    enough build support to build external modules'
1231         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1232         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1233         @echo  ''
1234         @echo  'Configuration targets:'
1235         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1236         @echo  ''
1237         @echo  'Other generic targets:'
1238         @echo  '  all             - Build all targets marked with [*]'
1239         @echo  '* vmlinux         - Build the bare kernel'
1240         @echo  '* modules         - Build all modules'
1241         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1242         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1243         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1244         @echo  '  dir/            - Build all files in dir and below'
1245         @echo  '  dir/file.[ois]  - Build specified target only'
1246         @echo  '  dir/file.ko     - Build module including final link'
1247         @echo  '  prepare         - Set up for building external modules'
1248         @echo  '  tags/TAGS       - Generate tags file for editors'
1249         @echo  '  cscope          - Generate cscope index'
1250         @echo  '  kernelrelease   - Output the release version string'
1251         @echo  '  kernelversion   - Output the version stored in Makefile'
1252         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1253          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1254          echo  ''
1255         @echo  'Static analysers'
1256         @echo  '  checkstack      - Generate a list of stack hogs'
1257         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1258         @echo  '  versioncheck    - Sanity check on version.h usage'
1259         @echo  '  includecheck    - Check for duplicate included header files'
1260         @echo  '  export_report   - List the usages of all exported symbols'
1261         @echo  '  headers_check   - Sanity check on exported headers'; \
1262          echo  ''
1263         @echo  'Kernel packaging:'
1264         @$(MAKE) $(build)=$(package-dir) help
1265         @echo  ''
1266         @echo  'Documentation targets:'
1267         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1268         @echo  ''
1269         @echo  'Architecture specific targets ($(SRCARCH)):'
1270         @$(if $(archhelp),$(archhelp),\
1271                 echo '  No architecture specific help defined for $(SRCARCH)')
1272         @echo  ''
1273         @$(if $(boards), \
1274                 $(foreach b, $(boards), \
1275                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1276                 echo '')
1277         @$(if $(board-dirs), \
1278                 $(foreach b, $(board-dirs), \
1279                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1280                 printf "  %-16s - Show all of the above\\n" help-boards; \
1281                 echo '')
1282
1283         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1284         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1285         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1286         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1287         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1288         @echo  ''
1289         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1290         @echo  'For further info see the ./README file'
1291
1292
1293 help-board-dirs := $(addprefix help-,$(board-dirs))
1294
1295 help-boards: $(help-board-dirs)
1296
1297 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1298
1299 $(help-board-dirs): help-%:
1300         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1301         @$(if $(boards-per-dir), \
1302                 $(foreach b, $(boards-per-dir), \
1303                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1304                 echo '')
1305
1306
1307 # Documentation targets
1308 # ---------------------------------------------------------------------------
1309 %docs: scripts_basic FORCE
1310         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1311
1312 else # KBUILD_EXTMOD
1313
1314 ###
1315 # External module support.
1316 # When building external modules the kernel used as basis is considered
1317 # read-only, and no consistency checks are made and the make
1318 # system is not used on the basis kernel. If updates are required
1319 # in the basis kernel ordinary make commands (without M=...) must
1320 # be used.
1321 #
1322 # The following are the only valid targets when building external
1323 # modules.
1324 # make M=dir clean     Delete all automatically generated files
1325 # make M=dir modules   Make all modules in specified dir
1326 # make M=dir           Same as 'make M=dir modules'
1327 # make M=dir modules_install
1328 #                      Install the modules built in the module directory
1329 #                      Assumes install directory is already created
1330
1331 # We are always building modules
1332 KBUILD_MODULES := 1
1333 PHONY += crmodverdir
1334 crmodverdir:
1335         $(cmd_crmodverdir)
1336
1337 PHONY += $(objtree)/Module.symvers
1338 $(objtree)/Module.symvers:
1339         @test -e $(objtree)/Module.symvers || ( \
1340         echo; \
1341         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1342         echo "           is missing; modules will have no dependencies and modversions."; \
1343         echo )
1344
1345 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1346 PHONY += $(module-dirs) modules
1347 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1348         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1349
1350 modules: $(module-dirs)
1351         @echo '  Building modules, stage 2.';
1352         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1353
1354 PHONY += modules_install
1355 modules_install: _emodinst_ _emodinst_post
1356
1357 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1358 PHONY += _emodinst_
1359 _emodinst_:
1360         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1361         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1362
1363 PHONY += _emodinst_post
1364 _emodinst_post: _emodinst_
1365         $(call cmd,depmod)
1366
1367 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1368
1369 PHONY += $(clean-dirs) clean
1370 $(clean-dirs):
1371         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1372
1373 clean:  rm-dirs := $(MODVERDIR)
1374 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1375 clean: $(clean-dirs)
1376         $(call cmd,rmdirs)
1377         $(call cmd,rmfiles)
1378         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1379                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1380                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1381                 -type f -print | xargs rm -f
1382
1383 help:
1384         @echo  '  Building external modules.'
1385         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1386         @echo  ''
1387         @echo  '  modules         - default target, build the module(s)'
1388         @echo  '  modules_install - install the module'
1389         @echo  '  clean           - remove generated files in module directory only'
1390         @echo  ''
1391
1392 # Dummies...
1393 PHONY += prepare scripts
1394 prepare: ;
1395 scripts: ;
1396 endif # KBUILD_EXTMOD
1397
1398 # Generate tags for editors
1399 # ---------------------------------------------------------------------------
1400
1401 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1402 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1403 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1404
1405 ifeq ($(src),$(obj))
1406 __srctree =
1407 else
1408 __srctree = $(srctree)/
1409 endif
1410
1411 ifeq ($(ALLSOURCE_ARCHS),)
1412 ifeq ($(ARCH),um)
1413 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1414 else
1415 ALLINCLUDE_ARCHS := $(SRCARCH)
1416 endif
1417 else
1418 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1419 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1420 endif
1421
1422 ALLSOURCE_ARCHS := $(SRCARCH)
1423
1424 define find-sources
1425         ( for arch in $(ALLSOURCE_ARCHS) ; do \
1426                find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1427                     -name $1 -print; \
1428           done ; \
1429           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1430                -name $1 -print; \
1431           find $(__srctree)include $(RCS_FIND_IGNORE) \
1432                \( -name config -o -name 'asm-*' \) -prune \
1433                -o -name $1 -print; \
1434           for arch in $(ALLINCLUDE_ARCHS) ; do \
1435                test -e $(__srctree)include/asm-$${arch} && \
1436                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1437                     -name $1 -print; \
1438                test -e $(__srctree)arch/$${arch}/include/asm && \
1439                  find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1440                     -name $1 -print; \
1441           done ; \
1442           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1443                -name $1 -print; \
1444           find $(__srctree) $(RCS_FIND_IGNORE) \
1445                \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1446                -name $1 -print; \
1447           )
1448 endef
1449
1450 define all-sources
1451         $(call find-sources,'*.[chS]')
1452 endef
1453 define all-kconfigs
1454         $(call find-sources,'Kconfig*')
1455 endef
1456 define all-defconfigs
1457         $(call find-sources,'defconfig')
1458 endef
1459
1460 define xtags
1461         if $1 --version 2>&1 | grep -iq exuberant; then \
1462             $(all-sources) | xargs $1 -a \
1463                 -I __initdata,__exitdata,__acquires,__releases \
1464                 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1465                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1466                 --extra=+f --c-kinds=+px \
1467                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1468             $(all-kconfigs) | xargs $1 -a \
1469                 --langdef=kconfig \
1470                 --language-force=kconfig \
1471                 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1472             $(all-defconfigs) | xargs -r $1 -a \
1473                 --langdef=dotconfig \
1474                 --language-force=dotconfig \
1475                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1476         elif $1 --version 2>&1 | grep -iq emacs; then \
1477             $(all-sources) | xargs $1 -a; \
1478             $(all-kconfigs) | xargs $1 -a \
1479                 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1480             $(all-defconfigs) | xargs -r $1 -a \
1481                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1482         else \
1483             $(all-sources) | xargs $1 -a; \
1484         fi
1485 endef
1486
1487 quiet_cmd_cscope-file = FILELST cscope.files
1488       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1489
1490 quiet_cmd_cscope = MAKE    cscope.out
1491       cmd_cscope = cscope -b
1492
1493 cscope: FORCE
1494         $(call cmd,cscope-file)
1495         $(call cmd,cscope)
1496
1497 quiet_cmd_TAGS = MAKE   $@
1498 define cmd_TAGS
1499         rm -f $@; \
1500         $(call xtags,etags)
1501 endef
1502
1503 TAGS: FORCE
1504         $(call cmd,TAGS)
1505
1506 quiet_cmd_tags = MAKE   $@
1507 define cmd_tags
1508         rm -f $@; \
1509         $(call xtags,ctags)
1510 endef
1511
1512 tags: FORCE
1513         $(call cmd,tags)
1514
1515
1516 # Scripts to check various things for consistency
1517 # ---------------------------------------------------------------------------
1518
1519 includecheck:
1520         find * $(RCS_FIND_IGNORE) \
1521                 -name '*.[hcS]' -type f -print | sort \
1522                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1523
1524 versioncheck:
1525         find * $(RCS_FIND_IGNORE) \
1526                 -name '*.[hcS]' -type f -print | sort \
1527                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1528
1529 namespacecheck:
1530         $(PERL) $(srctree)/scripts/namespace.pl
1531
1532 export_report:
1533         $(PERL) $(srctree)/scripts/export_report.pl
1534
1535 endif #ifeq ($(config-targets),1)
1536 endif #ifeq ($(mixed-targets),1)
1537
1538 PHONY += checkstack kernelrelease kernelversion
1539
1540 # UML needs a little special treatment here.  It wants to use the host
1541 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1542 # else wants $(ARCH), including people doing cross-builds, which means
1543 # that $(SUBARCH) doesn't work here.
1544 ifeq ($(ARCH), um)
1545 CHECKSTACK_ARCH := $(SUBARCH)
1546 else
1547 CHECKSTACK_ARCH := $(ARCH)
1548 endif
1549 checkstack:
1550         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1551         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1552
1553 kernelrelease:
1554         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1555         $(error kernelrelease not valid - run 'make prepare' to update it))
1556 kernelversion:
1557         @echo $(KERNELVERSION)
1558
1559 # Single targets
1560 # ---------------------------------------------------------------------------
1561 # Single targets are compatible with:
1562 # - build with mixed source and output
1563 # - build with separate output dir 'make O=...'
1564 # - external modules
1565 #
1566 #  target-dir => where to store outputfile
1567 #  build-dir  => directory in kernel source tree to use
1568
1569 ifeq ($(KBUILD_EXTMOD),)
1570         build-dir  = $(patsubst %/,%,$(dir $@))
1571         target-dir = $(dir $@)
1572 else
1573         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1574         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1575         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1576 endif
1577
1578 %.s: %.c prepare scripts FORCE
1579         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1580 %.i: %.c prepare scripts FORCE
1581         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1582 %.o: %.c prepare scripts FORCE
1583         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1584 %.lst: %.c prepare scripts FORCE
1585         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1586 %.s: %.S prepare scripts FORCE
1587         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1588 %.o: %.S prepare scripts FORCE
1589         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1590 %.symtypes: %.c prepare scripts FORCE
1591         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1592
1593 # Modules
1594 / %/: prepare scripts FORCE
1595         $(cmd_crmodverdir)
1596         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1597         $(build)=$(build-dir)
1598 %.ko: prepare scripts FORCE
1599         $(cmd_crmodverdir)
1600         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1601         $(build)=$(build-dir) $(@:.ko=.o)
1602         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1603
1604 # FIXME Should go into a make.lib or something
1605 # ===========================================================================
1606
1607 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1608       cmd_rmdirs = rm -rf $(rm-dirs)
1609
1610 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1611       cmd_rmfiles = rm -f $(rm-files)
1612
1613 # Run depmod only if we have System.map and depmod is executable
1614 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1615       cmd_depmod = \
1616         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1617                 $(DEPMOD) -ae -F System.map                                     \
1618                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1619                 $(KERNELRELEASE);                                               \
1620         fi
1621
1622 # Create temporary dir for module support files
1623 # clean it up only when building all modules
1624 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1625                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1626
1627 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1628           $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1629           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1630
1631 quiet_cmd_as_o_S = AS      $@
1632 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1633
1634 # read all saved command lines
1635
1636 targets := $(wildcard $(sort $(targets)))
1637 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1638
1639 ifneq ($(cmd_files),)
1640   $(cmd_files): ;       # Do not try to update included dependency files
1641   include $(cmd_files)
1642 endif
1643
1644 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1645 # Usage:
1646 # $(Q)$(MAKE) $(clean)=dir
1647 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1648
1649 endif   # skip-makefile
1650
1651 PHONY += FORCE
1652 FORCE:
1653
1654 # Declare the contents of the .PHONY variable as phony.  We keep that
1655 # information in a variable se we can use it in if_changed and friends.
1656 .PHONY: $(PHONY)